We can delete files by giving its URL or path in PHP by using unlink command. This command will work only if write permission is given to the folder or file. Without this the delete command will fail. Here is the command to delete the file.
We can check the path by using file_exists function to know if file is available for deletion.
Here $path is the relative path of the file calculated from the script execution. Here is an example of deleting file by using relative path